JPH0542575A - Method for displaying operating data in injection molding machine - Google Patents

Abstract

PURPOSE:To provide a method for displaying a driving data with excellent detecting and discriminating properties and condition setting properties and good convenience to use in an injection molding machine wherein variety of embodiments of graphic displays of measured values are possible. CONSTITUTION:A display treating part 13 performs a graphic display wherein measured graphic data of a main process in one cycle and a measured graphic data by a plurality of measured items along one cycle time axis are described in parallel and a logic graph display in comparison of a condition of a plurality of input and output ports among one cycle time axis based on a command of an operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of displaying operation data in an injection molding machine, and more particularly, to a microcomputer (hereinafter referred to as a microcomputer) for capturing and storing operation data during continuous operation and under the control of the microcomputer. The present invention relates to a method of displaying operation data in an injection molding machine having a display device capable of displaying various mode images.

[0002]

2. Description of the Related Art Recent microcomputer-controlled injection molding machines are equipped with a display device such as a color CRT display or a color LCD display, and this display device sets or confirms molding operation conditions for automatic molding operation. Various setting condition display mode images for displaying, various actual measurement data display mode images for displaying actual measurement data of many measurement items during automatic molding operation, automatic inspection items are displayed at regular inspection time A regular inspection mode image for prompting, an alarm mode image for recognizing this when an abnormality occurs, and the like are displayed.

By the way, conventionally, the image displayed in the above-mentioned measured data display mode is often shown by enumerating numbers, which makes it difficult to grasp the driving characteristics such as the injection stroke at a glance. .. In view of this point, the applicant of the present application has developed a machine (injection molding machine) having a function of displaying measured data of an injection stroke together with set values on a display screen as a graphic image, and proposed it as Japanese Patent Laid-Open No. 26726/1990. ..

[0004]

In the above-mentioned prior application, the injection speed and the injection pressure during the injection stroke are set along the stroke (distance) axis in the primary injection stroke, and the holding (secondary injection) stroke is performed. In, the graphics are displayed along the time axis. However, in the above-mentioned prior application, it is desired that only the actually measured graphic image of the ejection stroke is displayed as the graphic display, and the actually measured data of the other stroke during one cycle is also displayed as the graphic image. Further, in order to grasp the entire operating state over one cycle, it was also desired to be able to additionally display each measured data for one cycle period and display it in a graphic form. Furthermore, since the state of a large number of input / output ports during one cycle, that is, the on / off timings of the actuators and the like could not be grasped at a glance in the past, the on / off timings of the actuators and the like during one cycle. It was also desired to be able to display graphics in contrast.

The present invention has been made in view of the above points,
The purpose of this is that the actual driving data of the main strokes in one cycle can be displayed graphically.
Along with the 1-cycle time axis, the measured data of a plurality of actual measurement items can be additionally written and displayed graphically, or similarly, the states of the input / output ports of a plurality of items can be compared along the 1-cycle time axis and displayed as a logic graph. An object of the present invention is to provide a method of displaying operation data in an injection molding machine which is capable of displaying various types of measured data in a graphic form and is excellent in monitoring / identifying property and condition setting property.

[0006]

In order to achieve the above-mentioned object, the present invention comprises a microcomputer for driving and controlling each part of a machine on the basis of each set operating condition value and measurement information from each sensor. The microcomputer executes a series of molding operation steps such as a charging step, a mold opening / closing step, an injection step, an ejecting step, etc. according to a predetermined molding operation program, and also captures and stores actual measurement data of each operating condition during operation. In the method of displaying operation data on the molding machine, the microcomputer converts the measured data taken in by the operator's instruction, and the display device attached to the machine displays the graphic image of the charging process, the graphic image of the mold opening / closing process, and the injection process. The graphic image of the, the graphic image of the eject process is selectively displayed, and the The measured data of Nozomu plurality of items, or to Gurafiku displayed together along one cycle time axis,
A logic graph showing the states of the input / output ports, that is, the on / off timings of a desired plurality of actuators for driving and controlling the respective parts, is displayed along with the one-cycle time axis.

[0007]

[Function] The microcomputer that controls the entire machine can capture all the actual measurement data of preset monitor items during automatic operation over a continuous predetermined number of shots and rewrite this into a predetermined storage area. Store.
When one of the actual measurement data display mode images desired by the operator, for example, the display of the graphic image of the charging process is selected by the key operation, the display processing unit in the microcomputer causes the graph scale based on a predetermined image generation program. An image is generated and actual measurement data necessary for display in the display mode is taken in, drawn and combined on a graph scale image, and displayed on a display device such as a color CRT display of a machine. Similarly, when the operator selects only a plurality of actually measured data items to be displayed in the 1-cycle graphic image and specifies the display of the 1-cycle graphic image, the actually measured data of the desired plural items are written together along the 1-cycle time axis. It is displayed as a graphic. Similarly, the operator selects a plurality of input / output port items to be displayed in the 1-cycle logic graph image,
When the display of the 1-cycle logic graph image is specified,
A logic graph showing the on / off timing of the selected input / output port is displayed along with the one-cycle time axis.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a simplified block diagram of a control system of an injection molding machine according to this embodiment. In FIG. 1, 1 is a microcomputer that controls the operation and display control of the entire machine (injection molding machine), 2 is a sensor group including a large number of sensors provided in each part of the machine, and 3 is each part of the machine. A driver group composed of a large number of driver circuits for driving and controlling a large number of drive sources provided, 4 is a key input device arranged on the front face of the machine, and 5 is a device arranged adjacent to the key input device. The display device is, for example, a color CRT display, a color LCD or the like.

The microcomputer 1 shown in FIG.
Control of the entire molding process such as injection operation, mold opening / closing operation, eject operation, calculation / storing processing of measured data, calculation processing / determination processing such as non-defective / defective product determination processing, abnormality determination processing, or the display device 5 Various processes such as output image display control process are executed. This microcomputer 1 actually has various I
/ O interface, ROM, RAM, CPU, etc., and executes various processes by various programs created in advance. In the present embodiment, the molding condition setting storage unit 10 and the molding process control unit 11 are executed. , The measured value storage unit 12, the display processing unit 13 and the like,
The following will be described. The display processing unit 13 is provided with a data conversion processing unit 14, a graph scale generation unit 15, a fixed display data storage unit 16, a display image data generation unit 17, and the like.

The molding condition setting storage unit 10 stores various operating condition values input by the key input device 4 in a rewritable form. The operating condition values include, for example, tightening force, electric power value, relationship between screw position and screw rotation speed during charge stroke, screw retreat speed, and back pressure, suck back control condition, injection start point (position), Injection speed conditions and injection pressure conditions up to the holding pressure switching point (position), secondary injection pressure (holding pressure) conditions from the holding pressure switching time to the holding pressure end time, band heater temperature of each part, mold closing (mold clamping) ) Stroke and speed control conditions and mold clamping force, mold opening stroke and speed control conditions, eject control conditions, control conditions for the automatic product take-out machine, and the like.

The molding process control unit 11 is based on a molding process control program created in advance and setting condition values stored in the molding condition setting storage unit 10, and the sensor group 2 arranged in each part of the machine. Through the driver group 3 (motor driver, hydraulic cylinder driver, heater driver, etc.) while referring to measurement information from (position sensor, pressure sensor, temperature sensor, etc.) and timing information from a clock built in itself. The corresponding drive source is drive-controlled to execute a series of molding steps. Specific examples of the sensors included in the sensor group 3 include an ACC (accumulator) charge pressure detection sensor, a screw stroke detection sensor, a screw rotation speed detection sensor, an injection pressure / back pressure detection sensor, and a mold opening / closing stroke detection sensor. , A mold clamping pressure detection sensor, a mold internal pressure detection sensor, an eject protrusion / return stroke detection sensor, an eject cylinder pressure detection sensor, an operation confirmation sensor of a product automatic take-out machine, a temperature sensor of each part, a power value detection sensor, and the like.

All the actual measurement data of preset monitor items during continuous automatic operation are stored in the actual measurement value storage unit 12 over a continuous predetermined number of shots. The monitor items that are taken in include time monitoring items, position monitoring items, rotation speed monitoring items, speed monitoring items, pressure monitoring items, temperature monitoring items, power monitoring items, and other important items of the molding operation condition setting items described above. Are almost overlapping. The speed measurement value is calculated in real time by an arithmetic processing unit (not shown) in the microcomputer 1 based on the measurement information and the clock information from each of the stroke (position) detection sensors described above, and this is measured value storage unit 12 Is stored in a predetermined area.

The display processing unit 13 displays the display image data of the specified display mode based on the display image creating / control program created in advance by the operator's command to call the display image of the mode desired by the key input device 4. To create. That is, when a predetermined display image calling command arrives by the operator, the data conversion processing unit 14 of the display processing unit 13 uses the information stored in the molding condition setting storage unit 10 or the measured value storage unit 12 as necessary. Data for use in displaying the display mode image is extracted, and is converted into a form corresponding to the specified display mode of the display mode image. For example, if the specified display mode is a graphic image of a certain process,
The extracted data is converted into line drawing image data, the predetermined data such as the maximum value is converted into numerical image data, and the designated display mode is the operation state setting image for a certain process. Then, the extracted data is converted into numerical image data. When the designated display mode is a graphic image, the graph scale generation unit 15 generates a graph scale (graph) created in advance based on the content of the data conversion processing unit 14 described above or the scale instruction of the operator. A graduation generation program generates graph graduation image data and graduation numerical image data at a predetermined magnification.

The generation processing data of the data conversion processing unit 14 and the graph scale generation unit 15 are fetched by the display image data generation unit 17, and when the designated display mode is a graphic image, a predetermined magnification is set. At a predetermined position on the graph scale image data, the line drawing-processed graphic image data that has been converted and processed into an enlargement / reduction ratio according to the graph scale is overwritten and combined. Further, from a large number of characters, symbols, graphic figures, ruled line data, etc., which are fixed data for mode images, which have been created and stored in advance in the display fixed data storage unit 16, they are used for displaying the display mode image. The data is extracted, taken in by the display image data generation unit 17, and similarly synthesized as display image data. As a result, the display image data generation unit 17 arranges and synthesizes the specified graphic display image graph scale, scale numbers, line drawing graph, mode display characters, unit symbols, item display characters, predetermined data numerical values, and the like. Further, image data to which color classification information and the like are added is created, and this is held rewritably. When the designated display mode is not a graphic image, the data conversion processing unit 14
According to the contents of the display fixed data storage unit 16 and the display image data generation unit 17, the image data for the display image similarly designated is generated and held.

The image data of the display image data generating section 17 is transferred to a frame buffer (not shown) and temporarily stored therein, and the output of the frame buffer is sent to the display device 5 in response to a command from the display processing section 13. Display device 5
The image data in the predetermined mode will be displayed on the display screen.

FIG. 2 shows the charge stroke graphic image of the latest molding cycle which is called up on the display screen of the display device 5 when the operator designates the display of the charge stroke graphic image. In the figure, the horizontal axis indicates the screw position (screw retreat stroke), and the numerical value indicating the scale thereof is shown on the lower side. The vertical axis shows the back pressure on the left side in the figure, and the numerical values indicating the scale of this are shown on the left side of the figure.
The right side of the figure on the vertical axis shows the screw rotation speed and the screw retreat speed, and the numerical values showing these scales are shown in two layers on the right side of the figure (upper speed and lower speed). I have been told. Further, in the figure, 21 is the actual measurement data of the back pressure, 22 is the actual measurement data of the screw retreat speed, 23 is the actual measurement data of the screw rotation speed, 24 is the setting data of the back pressure, and 25 is the screw rotation. The setting data of each number is shown. Here, on the display screen of FIG. 2, the graph characteristic lines regarding pressure, speed, and rotation speed are displayed in different colors,
In addition, each scale number, unit, and character are displayed in the same color according to this color classification so that the operator can recognize at a glance which graph characteristic line represents what. (Note that this color classification is the same in FIGS. 3 and 4 described later). When such a graphic image display mode of the charge process is provided, the back pressure, the screw retreat speed, and the screw rotation speed from the charge start point (injection completion point which is the forward limit of the screw) to the charge completion point (measurement completion point) The correlation can be easily grasped and reflected in the good plasticization control of the resin material, and it is also very useful for the cause diagnosis when defective products occur.

The lower part of the display screen shown in FIG. 2 shows the current operation function assigned to the function key (not shown) in the key input device 4 displayed when the graphic image is displayed and the current operation function. In the initial state, it is displayed that the selected state with the "once / overlap" function key is "= 1 write", and also with the "scale mode" function key. It is displayed that the state is "= auto". In this state, the microcomputer 1 draws the measured graphic data only for the latest molding 1 cycle, and the graph scale is automatically set by the microcomputer 1. I am doing it. Then, if the function key corresponding to "once / overlap" is pushed in this state, the display of "= 1 time writing" is displayed as "=
By switching to "overwriting", the microcomputer 1 enters the overwriting mode, and the measured graphic data is overwritten and displayed over a plurality of molding cycles including the latest molding cycle. In addition, when the function key corresponding to the "scale mode" is pushed in the state of Fig. 2, the display of "= auto" is switched to "= setting", and the microcomputer 1 enters the scale setting acceptance state. By making the setting, the scale is generated at the enlargement / reduction rate according to the scale instructed by the operator, and the actual measurement graph and the setting graph are drawn accordingly. Switching between “= 1 time writing” and “= overwriting” by this function key and scale selection by “= automatic” and “= setting” are the same in the following display images.

Further, in the present embodiment, the operating condition of the graphic display item can be set even in the graphic image display state, and the microcomputer 1 enters the operating condition setting acceptance mode when the key operation is appropriately performed. Is becoming For example, in the charge stroke graphic image of FIG. 2, setting (or changing) of charge operation conditions
In the acceptance mode, the back pressure setting characteristic line 24 described above,
By drawing the setting characteristic line 25 of the screw rotation speed by moving the cursor and performing the fixed registration operation, the input data processing calculation unit (not shown) in the microcomputer 1 causes the back pressure corresponding to the screw position and the screw rotation. The number is calculated and the data in the predetermined area of the molding condition setting storage unit 10 is updated and registered.

FIG. 3 shows the charge stroke graphic image of the latest molding cycle called on the display screen of the display device 5 when the operator specifies the display of the graphic image of the injection stroke. In the figure, the right half of the horizontal axis is set so that the screw position (the forward stroke of the screw in the primary injection stroke from the right end measurement completion point to the central holding pressure switching point) is increased to the right with the screw forward limit set to 0. In the left half of the horizontal axis, the time (pressure-holding stroke time from the pressure-holding switching time to the pressure-holding completion time) is shown to increase to the left with the pressure-holding switching point set to 0. The numerical value indicating is shown on the lower side. Further, the vertical axis shows the injection pressure on the left side in the figure, and the numerical value showing the scale of this is shown on the left side of the figure, and the right side of the figure on the vertical axis shows the injection speed, Numerical values indicating the scale of this are shown on the right side of the figure. Also in the figure,
Reference numeral 31 indicates injection speed measurement data, 32 indicates injection pressure measurement data, 33 indicates injection speed setting data, and 34 indicates injection pressure setting data. Although not shown in FIG. 3, it is possible to add actually measured graphic data of the mold internal pressure to the graphic image of the injection stroke. By providing such a graphic image display mode for the injection stroke, it is possible to easily grasp the measured injection speed change during the primary injection stroke and the measured holding pressure change during the holding pressure (secondary injection) stroke, and to achieve good injection. -It can be reflected in the filling control, and it will be very useful for cause diagnosis when defective products occur.

FIG. 4 shows the mold opening / closing stroke graphic image and the eject stroke graphic image of the latest molding cycle which is called up on the display screen of the display device 5 when the operator designates the display of the graphic image of the mold opening / closing stroke. .. That is, in this embodiment, by designating the display of the graphic image of the mold opening / closing process, the mold opening / closing process graphic image and the eject process graphic image are simultaneously displayed on the same screen. The reason for this is that the mold opening / closing process and the ejecting process are related to each other, and it is convenient for the operator to observe and monitor if they are displayed simultaneously on the same screen. Of course, it is also possible to display the mold opening / closing process graphic image and the eject process graphic image on different screens. In FIG. 4, part A is a graphic image during the mold opening process, part B below the part A is a graphic image during the mold closing process, and part C on the right side of the part A is a graphic image during the ejection projecting process. , The lower part of the C part shows the graphic image at the time of the eject return process. In the figure, the horizontal axes of the A and B parts (die opening / closing stroke) are shown so that the die opening / closing stroke (stroke of the piston rod of the die clamping cylinder) increases from the right end die clamping completion point to the left. The horizontal axes of the C and D parts (ejection stroke) are shown so that the eject stroke (stroke of the piston rod of the eject cylinder) increases from the left end eject return completion point to the right. Shown on the bottom. The vertical axis on the left side of FIG. 3 indicates pressure, the numerical value indicating this scale is shown on the left side, and the vertical axis on the right side of FIG. 3 indicates speed, and the numerical value indicating this scale is Shown on the right. Here, in the figure, 41 is the actual measurement data of the mold opening / closing speed, 42 is the actual measurement data of the mold opening / closing pressure (hydraulic pressure of the mold clamping cylinder), 43 is the actual data of the eject protrusion / return speed, and 44 is the eject pressure (eject cylinder). Oil pressure), 45 is mold opening / closing speed setting data, 46 is mold opening / closing pressure setting data, 47 is eject ejecting / returning speed setting data, and 48 is eject pressure setting data. Are shown respectively. By providing a graphic image display mode that simultaneously displays such a mold opening / closing stroke graphic image and an eject stroke graphic image, it is possible to visually observe and monitor the die opening / closing stroke and the eject protrusion / return stroke. It can be performed at a glance and can be reflected in the setting of good operating conditions, and it is also very useful in clarifying the cause when an abnormality occurs.

FIG. 5 shows an example of the 1-cycle graphic image of the latest molding cycle called on the display screen of the display device 5 when the operator designates the display of the 1-cycle graphic image. In this one-cycle graphic image, a plurality of actually-measured graphic data items selected by the operator in advance are simultaneously displayed in the form of being written along the one-cycle time axis. In this embodiment, the injection speed, injection pressure, charge rotation speed,
Mold opening / closing speed, eject ejecting / returning speed, mold internal pressure, electric power, tightening force, ACC pressure, preliminary items that can be set arbitrarily 1,
By arbitrarily selecting 5 items from the 11 items of 2, the measured graphic data of the selected 5 items are displayed at the same time, and the selection and combination of these 5 items can be performed at any time. It has become so. The horizontal axis of FIG. 5 is the one-cycle time axis as described above, and the numerical value indicating the scale is shown on the lower side. Also,
The vertical axis in FIG. 5 does not indicate a specific scale value, but the left side of the leftmost vertical axis has a character display representing the currently displayed actual measurement item. Then, the measured graphic data of each item displayed along the time axis is commensurate with the height of the area assigned to each item (the area where the graph display area marked with a broken line is divided into five horizontally). The graph is displayed on the scale of the automatically set magnification. By providing such a graphic image display mode of a one-cycle graphic image, it is possible to simultaneously grasp at a glance the actual measurement data (operating state) of a plurality of desired items in one cycle, and to determine the operating time of each stroke in one cycle. It is easy to study,
It can greatly contribute to the setting and examination of favorable molding operation conditions through one cycle.

FIG. 6 shows an example of the 1-cycle logic graph image of the latest molding cycle called on the display screen of the display device 5 when the operator specifies the display of the 1-cycle logic graph image. In this one-cycle graph image, the state of any number of input / output ports selected by the operator in advance, that is, the actuators (solenoids of electromagnetic control valves, etc.) arranged in each part of the machine.
Logic graph data indicating on / off timings of the above are simultaneously displayed in a form of being written along the one-cycle time axis. In this embodiment, 16
By arbitrarily selecting 20 items from 0 input / output ports, the measured graphic data of the selected 20 items can be simultaneously displayed.
The selection and combination of 0 items can be performed at any time. The horizontal axis of FIG. 6 is the one-cycle time axis as described above, and the numerical value indicating the scale is shown on the lower side.
Further, on the left side of the leftmost vertical axis in FIG. 5, a character display representing the currently displayed actual measurement item is displayed, and the on / off timing of the actuator or the like corresponding thereto is displayed as a logic graph. By providing such a graphic image display mode of the 1-cycle logic graph image, the on / off relationship of a large number of desired input / output ports during 1 cycle can be grasped at a glance, and the cause of the abnormality can be discriminated. Can be done easily and reliably.

[0023]

As described above, according to the present invention, the actual measurement data of the main strokes in one cycle can be graphically displayed, and the actual measurement data of a plurality of actual measurement items can be displayed along the time axis of one cycle. It is also possible to display them side by side in the form of a graphic display, or similarly, display the logic graph by comparing the states of a plurality of input / output ports along the 1-cycle time axis.
Therefore, it is possible to provide an actual measurement data graphic display in various forms as a whole, and it is possible to provide an operation data display method for an injection molding machine which is excellent in monitoring / identifying property and condition setting property and is of great value.

[Brief description of drawings]

FIG. 1 is a simplified block diagram of a control system of an injection molding machine according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a graphic image of a charging process according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an example of a graphic image of an ejection stroke according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an example of a graphic image of a mold opening / closing process and an ejecting process according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an example of a one-cycle graphic image according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an example of a one-cycle logic graph image according to one embodiment of the present invention.

[Explanation of symbols]

 1 Microcomputer (microcomputer) 2 Sensor group 3 Driver group 4 Key input device 5 Display device 10 Molding condition setting storage unit 11 Molding process control unit 12 Measured value storage unit 13 Display processing unit 14 Data conversion processing unit 15 Graph scale generation unit 16 Fixed data storage for display 17 Display image data generator

Claims (10)

[Claims] 1. A microcomputer for driving and controlling each part of a machine based on each set operating condition value and measurement information from each sensor, wherein the microcomputer carries out a charging process in accordance with a predetermined molding operation program. , A mold opening / closing stroke, an injection stroke, an ejecting stroke, and the like, and a series of molding operation strokes are executed, and in an injection molding machine that captures and stores actual measurement data of each operating condition during operation, the microcomputer can be operated by the operator's instruction. Convert the captured measurement data to selectively display the graphic image of the charge process, the graphic image of the mold opening / closing process, the graphic image of the ejection process, and the graphic image of the eject process on the display device attached to the machine. Display of operation data on injection molding machine characterized by Law. 2. The operation data in an injection molding machine according to claim 1, wherein the graphic image of the mold opening / closing process and the graphic image of the ejecting process are displayed together on the same screen. Display method. 3. The graphic image according to claim 1, wherein the graphic image of the charge process, the graphic image of the mold opening / closing process, and the graphic image of the eject process are displayed graphically along a stroke (distance) axis. Display method of operation data on injection molding machine. 4. The method for displaying operation data in an injection molding machine according to claim 1, wherein the actually measured graphic data displayed as the graphic can be displayed so as to overlap with the set graphic data. 5. The injection according to claim 4, wherein an operating condition corresponding to the set graphic data can be automatically registered by an operator drawing the set graphic data on a display screen. How to display operating data on molding machines. 6. A microcomputer for driving and controlling each part of the machine based on each set operating condition value and measurement information from each sensor, wherein the microcomputer carries out a charging process in accordance with a predetermined molding operating program. , A mold opening / closing stroke, an injection stroke, an ejecting stroke, and the like, and a series of molding operation strokes are executed, and in an injection molding machine that captures and stores actual measurement data of each operating condition during operation, the microcomputer can be operated by the operator's instruction. It is characterized in that the measured data taken in is converted and the measured data of an arbitrary item among the measured items measured is graphically displayed on the display device attached to the machine along the 1-cycle time axis. Display method of operation data on injection molding machine. 7. The graphic according to claim 6, wherein a combination of a plurality of measurement items is arbitrarily designated from the actually measured measurement item group, and the measurement data of the designated items are additionally written along a 1-cycle time axis. A method for displaying operation data in an injection molding machine, characterized by displaying the operation data. 8. The item according to claim 7, wherein the measurement items that can be designated include at least an injection speed, an injection pressure, a charge rotation speed, a mold opening / closing speed, and an eject ejecting / returning speed. A method of displaying operating data on a characteristic injection molding machine. 9. A microcomputer for driving and controlling each part of the machine on the basis of each set operating condition value and measurement information from each sensor, wherein the microcomputer carries out a charging process according to a predetermined molding operating program. , A mold opening / closing stroke, an injection stroke, an eject stroke, and the like, and a series of molding operation strokes are executed, and an injection molding machine that captures and stores actual measurement data of each operating condition during operation A method for displaying operation data in an injection molding machine, characterized in that a logic graph showing a state of an input / output port is displayed along a one-cycle time axis on a display device attached to. 10. The combination according to claim 9, wherein a combination of a plurality of items is arbitrarily designated from a large number of the input / output port items, and the logic graph corresponding to each input / output port of the designated item is cycled for one cycle. A method of displaying operation data in an injection molding machine, characterized in that it is displayed along with a time axis.